Under which of the following conditions are two random variables (X, Y) statistically correlated?
a. fx(x) * fy (y) = 1
b. No answer text provided.
c. fxy(x,y) ≠ fx (x) * fy (y)
[infinity] [infinity]
d. ∫ ∫ fxy(x, y)dxdy = 1
-[infinity] -[infinity]